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Welcome to the Kapteyn Package!

The Kapteyn Package is a collection of Python modules and applications
developed by the computer group of the
Kapteyn Astronomical
Institute, University of Groningen, The Netherlands.
The purpose of the package is to provide tools
for the development of astronomical applications with Python.

The handling of spatial and spectral coordinates,
WCS projections and transformations between different sky systems.
Spectral translations (e.g., between frequencies and velocities) are
supported and also mixed coordinates. (Modules
wcs and
celestial.
Module wcs uses Mark Calabretta's WCSLIB.)

Versatile tools for writing small and dedicated applications for the
inspection of FITS headers, the extraction and display of (FITS) data,
interactive inspection of this data (color editing) and for the creation
of plots with world coordinate information. See the examples in the
maputils tutorial
and the plots in the
gallery
of all-sky plots.

Utilities for use with matplotlib such as
obtaining coordinate information from plots, interactively modifiable
colormaps and timer events
(module mplutil); tools for parsing and
interpreting coordinate information entered by the user (module
positions).

A function to search for gaussian components in a profile
(module profiles) and
a class for non-linear least squares fitting
(module kmpfit).